Fluid-pressure-controlling mechanism for glass-drawing machines.



- 0. DAY. FLUID PRESSURE CONTROLLING MECHANISM FOR GLASS DRAWING MACHINES. v

APPLIOATION TILED MAY 1, 1913;

Patented Jan. 12, 1915.

A WITNESSES THE NORRIS PETERS C.I-.. FHmfO-LITHQ. WA5HING"""- 5 1'.

sTA'rns P LrENT 'QFM E CHARLES DAY, or ARNOLD, PENNSYLVANIA, AssIeNoa or oNE-HALF' T0 .i'onN J.

' NIGON, OF NEW KENSINGTON, PENNSYLVANIAL FLUID-PRESSURE-CONTROLLING MECHANISM FOR GLASS-DRAWING MACHINESf,

Application filed May 1,1913. Serial No. 734,915.

To all whom it may concern:

Be it known that 1, CHARLES DAY, a citizen of the United States of America, residing at Arnold, in the county of l/Vestmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Fluid-Pressure-Controlling Mechanism for Glass-Drawing Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to air valves and valve gearing for glassdrawing machines,

and the primary object of my invention is to provide a novel automatic valve mechanism by which a low pressure of air can be obtained for producing a cap preparatory to drawing a cylinder or tube and then a high or greater pressure of air for forming a glass cylinder or tube as it is drawn from a pot or other receptacle.

Another object of this invention is to pro vide air valves and valve gearing that are reversible whereby they can be used in connection with left or right hand machines for controlling the supply of air to a drawing head or glass drawing apparatus whereby a primary and secondary supply of air can be obtained to insure a perfect and uniform cap formation and a cylinder or tube of various sizes.

A further object of this invention is to provide a simple, durable and inexpensive valve mechanism of the above type that can be easily operated and readily adjustedto obtain desired results' With the above and other objects in view the invention resides in the novel construction, combination and arrangement of parts to be hereinafter specifically described and then claimed.

Reference will now be had to the drawing,

I wherein 1 ing and producing a glass cylinder or tube. lhe plpe l is provided with a shut-off valve 2 and thestem 3 of said valve is provided withan arm 4, which is-adjustably mounted upon said stem by a set screw 5. One end of the arm 4: is pivotally connected by a screw 6 or other fastening means to the head 7 of a rack bar 8 adapted to be moved by apinion (not shown). The rack 8 and. the pinion simply constitute a conventional form of means for rocking the arm 4 whereby the valve 2 can be gradually opened andclosed.

Adjustably connected to the opposite end I of the arm 4 by screws9 or other fastening means 15 the. slotted end 10 of a segmentshaped head 11. The segment-shaped head 11, is slotted, as at 12 and adjustably mount- Specification of Letters Patent. Patented an. 12, 1915. i

justable crank is held by a set screw 22 and pivotally connected to the arm 20 by a screw 28 or other pivotal means is a contact piece 24 having a slotted segment shaped portion 25 that is adjustably' held relatively to the arm 20 by a screw 26 or other fastening means, whereby the contact piece 24 can be adjusted and fixed relatively to the arm 20. The crank of the stem 19 is positioned in the path of the roller 15, whereby said roller will contact with the arm 21, the contact piece 24 or the arm 20 according to desired adjustments.

In view of the arrangement of the valve 18 relatively to the valve 2, that is, its juxtaposition, it is evident that the outer end of the arm 4: will have a greater movement and consequently produce a greater action than that portion of the arm connected to the stem 3 of the valve 2. The valve crank of the valve 18 will therefore be actuated prior and in advance of the valve stem 3, consequently the valve 18 will be opened in advance of the valve 2 by reason of the roller 15 contacting with thepiece 24. Of course the location of the piece 24 relatively to the arm 20 determines the action or the opening and closing of the valve 18 relatively, to" the valve 2. As the valve 18 is opened sufiicient air passes through the by-path' to produce a cap above the surface of molten glasspre paratory to drawinga cylinder or tube. As the cap is produced it is necessary that a sulficient supply of air enter the cap for the production and formation of a glass cylinder or tube, and as the diameterof'the pipes-1 and 16 vary, it is apparent that a greater volume of air will pass through th'e'valve 2 than through the valve 18, consequently as the valve 2 is opened the necessary" supply of'air is admitted to thec'apforthe formation of a cylinder or tube.

Itis through the medium of'the adjustable crank and the contact piece 24 thereof; the adju'stableroller 25; the adjustable end ofthe headll, and the adjustable arin 4 that the openingof the valve 18 can beregulated relatively to the opening of the valve 2. Furthermore, the valve 17 permits of the air supply through the by-path being'regulated, and all ofthese regulations and adjustments contribute to the proper formation of a cap relativelyito a cylinder or tube. WltllOllfi any danger of either bulging or becoming distorted due to an irregular, low or high'pressure that isnot conducive to the formation of a uniform cylinder or tube.

It is thought" that the operation and utility of the valve gearing will be apparent without further description, and while in the drawing there is illustrated a preferred embodiment of the invention, it is to be understood that the structural elements are susceptible to such variations and modificationsas fall Within the scope of the appended claim.

hat I'claim' is-:

In an air valve and valve gearing for glass drawing machines, an air supply pipe, a valve in connection therewith, pipes connected tos'aid'air supply pipe and providing a by-path around said valve, a valve in connection'with' said pipes, an adjustable crank carried by the stem of said valve, an adjustable contact piece carried by said crank, an adjustable arm in connection with the s't'emof the first mentioned valve, an adjustable head carried by said arm, and an adjustable roller carried by said head and adapted to move said crank and the contact piece thereof whereby the valve of said pipes will be actuated in advance of the valve of said air supply pipe.

In testimony whereof I aflix my signature in the presence of two witnesses.

CHARLES DAY.

Witnesses:

JOHN J. NIGON, MAX H. SROLOVITZ.

Gopleao! t h i s patent may be obtained'for five cents each, by addressing the Commissioner of Patents,

I Washingtomhfll" 

